Automobile-lifting jack.



j. A. JEFFERY.

AUTOMOBILE LIFTING JACK.

APPLICATION FILED mi. I3. 1916.

Patented Sept. 19, 1916.

:lvMw'vWo z. fofifiAfeffery bl/02mg UNITED srArns rArnr OFFIQE JOHN A.JEFFERY, OF CANTON, NEW YORK, ASSIGNOR OF ONE-HALF TO B. E. CLEAVELAND,Ol CANTON, NEW YORK.

AUTOMOBILE-LIFTING JACK.

Application filed April 13, 1916.

To all whom it may concern:

Be it known that I, JOHN A. JnrrE-RY, a citizen of the United States,residing at Canton, in the county of St. Lawrence and State of New York,have invented certain new and useful Improvements in Automobile-LiftingJacks; and I do hereby declare the following to be a full, clear, andexact' description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters and figuresof reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in lifting jacksand is particularly adapted for use in raising automobiles and it hasfor its object to provide an automobile jack which will be simple ofconstruction, cheap to manufacture and which may be readily placed underan automobile to raise either end off the ground, or two of said jacksmay be employed to raise all four wheels of an automobile off the floorwhen it is desired.

The invention comprises various details of construction, combinationsand arrangements of parts which will be hereinafter fully described,shown in the accompanying drawings and then specifically defined in theappended claim.

I illustrate my invention in the accompanying drawings, in which:

Figure 1 is a top plan view of a jack constructed in accordance with myinvention and Fig. 2 is a side elevation of the same, the lifting headbeing shown elevated by dotted lines.

Reference now being had to the details of the drawings by letter, Adesignates the frame which is mounted on wheels A and A represents twoshafts suitably mounted in the frame A and each is provided with tworocking arms A which are pivotally connected at their upper ends by barsA to which are adjustably secured the lifting heads A which are adaptedto be placed under the front orrear axle of an auto- Specification ofLetters Patent.

Patented Sept. 19, 1916.

Serial No. 90,982.

mobile which is to be raised, said heads A being held in differentadjusted positions by means of a bolt A passed through registeringapertures in the bar A and apertures in the shank portion of the liftinghead A The arms upon one shaft are provided each with an angled member Ahaving a rounded corner A and a straight portion A, which roundedportion is adapted to permit the angle member to turn freely withoutinterference from the flange A of the frame A when the latter iselevated to the position shown in dotted lines in Fig. 2, the straightportion A bearing flat against the flange of the member A when in suchelevated position.

The rear ends of the bars A are connected by links A to the outer arms Bof the crank shaft B, mounted in bearings B on. the frame A. Said shaftB has upwardly extending crank arms B at its center which are connectedby a link rod B to an operating lever G which is pivoted at its lowerend to a rearwardly extending bar C which is secured to the frame. 7

It will be seen upon reference to Figs. 1 and 2 of the drawings that,when the jack is properly placed under an automobile with the axleresting on the lifting heads A the lever C may be pulled down and thelifting heads will rise vertically to the position shown in dottedlines, while the frame A slides under the automobile until the arms Ahave passed over the vertical center and are stopped by the flatportions A of the angled members A coming in contact with the undersurface of the lateral projection A of the frame.

WVhat I claim to be new is A lifting jack comprising a truck and shaftsmounted thereon, rocking arms mounted in pairs upon said shafts,a'fianged lifting frame to which said arms are connected, angled membersmounted one upon each of the arms of one shaft and each angled memberhaving a rounded corner and a fiat portion adjacent thereto, designed tobear against the under surface of the flanges of said lifting frame, arock shaft with crank arms mounted thereon, one In testimony whereof Ihereunto affix my ofbthe latter pivoted to said lifting frame, signaturein presence of tWo Witnesses.

a a1 secured to the truck frame and a lever pivoted to said bar andhaving link con- JOHN JEFFERY' nections with the other of the crank arms\Vit-nesses:

upon the rock shaft, and an adjustable lift- FRANK N. /LEAVELAND,

ing head upon the frame. GENEVIEVE BANTER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 01 Patents. Washington, D. C.

